Amazon.com: Gigabit Single Mode SFP Transceiver for Cisco GLC-LH-SMD, 1000Base-LX/LH Mini GBIC, 1.25G SFP LC Module, 1310nm SMF, up to 20km, for Cisco, Meraki,Ubiquiti UF-SM-1G,TP-Link TL-SM311LS and More, 2-Pack : Electronics
Cisco Single Mode SFP VS Cisco Multimode SFP, Which Is Better?